Portable frog or car-replacer



(No Model.)

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PORTABLE FROG 0R GAR REPLAGBR.

No. 388,397. Pate nte d Au 28, 1888.

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UNITED STATES PATENT OFFICE.

WILLIAM O. OOOKE, OF CHICAGO, ILLINOIS.

PORTABLE FROG OR CAR-REPLACER.

SPECIFICATION forming part of Letters Patent No. 388,397, dated August28, 1888.

Application filed May 15, 1888. Serial .No. 273,916. (No model.)

To all whom it may concern:

l 3e it known that I, WILLIAM O. COOKE, a citizen of the United States,residing at Chicago, Illinois, have invented a certain new and usefulImprovement in Portable Frogs or Car-Replacers, of which the followingis a specification.

The subjectmatter of the present invention is designed as an improvementupon the construction shown in Letters Patent of the United States, N 0.364,091, hearing date May 31, 1887. In using the portable frog describedin said Letters Patent it was ascertained that while with flanged wheelsthe frog operated perfectly, such was not the case with blind wheels, orwheels not having flanges, the wheels in this case being compressed byand bound between the side bars of the frog. My present invention isintended to overcome this difficulty, and also to provide meansforholding the frog rigidly to the rail, so as to prevent the rear endof the frog from tipping upward as the car is pushed upon the front endthereof.

In the drawings, Figure 1 is a plan view of a pair of frogs in positionupon the rails of the track; Fig. 2, an elevation in perspective of oneof the frogs fastened to the rail; and Fig. 3 a sectional view taken online 33 of Fig. 1, looking in the direction of the arrows.

Aand Bare two castings,which when united form my improved frog; 0, asidebar upon such frog for the purpose of directing the flanges of theWheels on the car intended to be replaced toward the rails; D, bolts ortongues for fastening together the two parts of the frog; E, a shoulderformed on the piece A; F F, tongues on the two pieces of the frogfitting into the recesses of the rail, and G a piece of the rail towhich the frog is attached.

In constructing my improved frog I make, by casting or forging, thepiece A, consisting of an arched bed or bridge piece adapted to fit overthe rail, and a side bar, 0, projecting below the bridge-piece, so as torest upon the ties, and passing backward and resting upon the topof therail. On the upper surface of this casting is formed a shoulder, E,which rises gradually from the surface of the bridge-piece until at itsrearward end it reaches a height equal to that of the side bar. Thisshoulder is formed directly over the rail of the rail.

and parallel thereto. At the sides of the piece A are formed' bolts ortongues which pass through mortises in the piece B and are held in placeby keys. The piece B is formed correspondingly to the same piecein myabovementioned patent, except that I omit the side bar formerlyconstructed thereon, and make the piece of such a height that when thetwo sections of my frog are fastened together the top of the piece B andthe bridge of the piece A shall be flush with one another. At therearward end of the two pieces composing my frog.

I form shoulders or tongues adapted to fit into the grooves in the sidesof the rail in order to prevent the frog from tipping upward as the carstrikes the forward end thereof. This construction is shown in Fig. 3 ofthe drawings.

As the other details of construction are plainly obvious from aninspection of the drawings, and differ in no way from that applied forin my prior patent, any further description of them here is consideredunnecessary.

In operating my improved frog the parts are detached from one another,placed on opposite sides of the rail, and then fastened together againby means of the tongues and mortises, or in any other suitable manner.As the wheels of the car which it is desired to replace strike theforward end of the frogs, they roll up theincline, and the flangesstriking against the side bars are guided thereby into their properposition on the inside of the rail, the tread of the wheel meanwhilepassing along up the side bar and down the incline onto the top When, asin the case of mogul engines, what are known as blind-wheels areused-that is to say, wheels having no flanges-the wheel passes in thesame manner up the crown of the frog and striking against the side baris unable to rise upon the same, and it would therefore become boundwere it not that the contact forces the wheel over upon the shoulder E,up the gradual ascent of which it rolls till it reaches the top, whenceit passes readily onto the side bar and thence onto the track.

I claim-- 1. A portable frog or car-replacer provided with a shoulderfor raising blind-wheels, sub stantially as described.

2. In a portable frog 0r car-replacer, the lugs fitting into the groovesin the sides of the combination of piece A, having shoulder E, rail andpreventing the frog from tilting or with piece B secured thereto,substantially as tipping, substantially as described.

described. WILLIAM O. COOKE. 5 3. In a portable frog or ear-replacer,the Witnesses:

combination of piece A, having shoulder E GEORGE S PAYSON,

and lug F, with piece B, having lug F, the M. F. FAIRBANKS.

